Bolthole Index

Weld County, Colorado

Building permits, zoning and land rules in Weld County, Colorado

44Index Score / 100
#47 of 64 in Colorado

Unincorporated Weld County, Colorado requires a building permit for structures regulated by its building code1. Weld County administers zoning outside incorporated municipalities and prohibits RVs as principal dwellings there23. Weld County Environmental Health Services handles septic permitting, site evaluations and inspections for systems with flows below 2,000 gallons per day4.

At a glance

Building permit
Required for buildings and structures regulated by the county code1
Zoning
Yes, for unincorporated Weld County2
Septic permits
County Environmental Health Services handles OWTS permits and inspections4
Owner-builder
Available to an owner who personally works on a residence they occupy or will occupy; permits and inspections still apply5
Tiny home
Approved for long-term living by CO Division of Housing, plus local zoning6
RV living
Not as a principal dwelling; temporary use while building requires Agricultural zoning and a ZPMH37
Minimum lot size
35 acres for unplatted land in the Agricultural zone; subdivision also requires public water8
Well permit
Required statewide from CO Division of Water Resources; review up to 49 days9

Who to call

Building permits

Weld County Planning and Development Services, Building Division

Building permits, plan review, and land-use/zoning administration for unincorporated Weld County

(970) 400-6100

1402 N. 17th Avenue, Greeley, CO 80631

Septic permits

Weld County Environmental Health Services (On-Site Wastewater Treatment Systems / Septic)

Septic (on-site wastewater treatment system / OWTS) permits, site evaluations, design reviews and inspections for systems with flows below 2,000 gallons per day in Weld County

(970) 400-6415

1150 O St., Greeley, CO 80631

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

Going off-grid in Weld County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Weld County, Colorado?

In unincorporated Weld County, a separate building permit is required before a regulated structure is built, enlarged, altered, repaired, moved, converted or demolished; some structures are exempt10. Since June 15, 2026, Weld County enforces the 2024 International Codes, including the Residential Code, with county amendments; the 2023 National Electrical Code remains adopted11. Like neighboring Colorado counties, Weld County requires a county building permit12. Skipping inspections or the adopted codes can lead to a building code violation and costly delays13. Owners may personally perform listed electrical, framing, foundation, plumbing and mechanical work at a residence they occupy or will occupy, but building permits and inspections still apply; compensated electrical or plumbing work requires state-licensed tradespeople5. The county's rules apply to unincorporated Weld County. Inside Frederick, Berthoud, Severance, Milliken and Dacono, the town or city issues building permits1415161718. Septic permitting for systems below 2,000 gallons per day stays with Weld County Environmental Health Services4.

Who issues Weld County building permits, and what do they cost?

Weld County Planning and Development Services, Building Division reviews building-permit applications and enforces construction codes in unincorporated areas; call (970) 400-6100 or visit 1402 N. 17th Avenue, Greeley, CO 8063119. Weld County requires an application for every project, with project-specific information and declarations under Chapter 29; use the residential, commercial or agricultural-exempt requirements for the proposed work20. Planning cases can be searched by record number, address or parcel number in the E-Permit Center21. The January 2025 building-fee schedule bases fees on valuation, size and project type; major plan review for a new single-family dwelling costs 65% of the building valuation fee, and starting regulated work without a building permit incurs an additional investigation fee22. The planning-fee schedule is dated 2024, so ask the division for current building and land-use charges23. Ask about Agricultural Exempt (COC) eligibility before treating a farm structure as exempt; we could not confirm its scope24.

Does Weld County have zoning?

Weld County zoning applies to unincorporated land, with Agricultural, Residential, Commercial, Industrial, Estate and Planned Unit Development categories225. Agricultural, Commercial and Industrial manufactured-home uses have separate zoning-permit procedures2627. Unplatted Agricultural land has a 35-acre minimum lot size; subdivision also requires public water rather than well water8. Road-right-of-way setbacks are 20 feet in Agricultural and residential zones and 25 feet in commercial and industrial zones; separate property-line offsets also apply28. Most unincorporated properties may have an accessory dwelling unit with a building permit and shared driveway, subject to district-specific water, sewer, septic and acreage rules29. The county's zoning rules stop at municipal limits. Inside Erie, Evans, Johnstown, Firestone, Frederick, Berthoud, Severance, Fort Lupton, Milliken, Lochbuie and Dacono, the municipality sets its own zoning3031323334353637383940. Septic stays with county health: Weld County Environmental Health Services handles septic permits for the Weld County part of Lochbuie41, while Johnstown also requires a town private-wastewater permit and compliance with the county health department's requirements42.

How do septic permits work in Weld County?

Weld County Environmental Health Services permits, evaluates and inspects on-site wastewater treatment systems (OWTS) with flows below 2,000 gallons per day443. A septic application is required for a new system, repair, upgrade, reconnection or vault; vaults are allowed only in specific circumstances4445. Submit forms, fees, site and soils evaluations and design documents for a county site inspection before permit issuance46. Bedroom additions, certain land-use applications and building-permit applications involving never-permitted systems trigger evaluation and inspection; commercial changes that increase flows or change use also trigger review by a registered professional engineer47. When a building permit adds bedrooms to a home on an OWTS, or the home's system has never been permitted, the county requires an OWTS evaluation and inspection; for a never-permitted system that means checking for a permit on file, filing the Statement of Existing form and map and the OWTS Evaluation Form, and supplying a pumping receipt from the past 2 years from a Health Department-licensed septic tank cleaner48. Weld County does not require a transfer-of-title septic inspection; annual inspections are recommended49. Public sewer is required where feasible, and private OWTS is limited to areas where sewer is infeasible; either way, county permits and inspections still apply505152. The county's sewer policy does not establish a countywide water-connection requirement, so ask Environmental Health about water for your parcel53. About 62.6% of county soils lack severe limitations for conventional drain fields, but parcel conditions control design54. Call (970) 400-6415 to check septic permit and installation-inspection records before buying55.

Can you live in an RV or tiny home on your land in Weld County?

An RV cannot be used as the principal dwelling on property governed by Weld County zoning in unincorporated Weld County3. While a home is being built on Agricultural-zoned property, temporary RV occupancy requires a Zoning Permit for a Manufactured Home; the county directs applicants to Planning or its E-Permit Center56. Temporary RV occupancy on residential-zoned parcels and general temporary camping are not confirmed, so ask Planning and Zoning before relying on an RV. Colorado approves Division of Housing-regulated tiny homes for long-term living, subject to local zoning6; Weld County's own tiny-home occupancy rule could not be confirmed, so ask Planning and Zoning before buying or placing one.

Building a home in Weld County: the steps, in order

  1. Confirm the parcel's zoning district, setbacks and home site with Weld County Planning and Zoning572819.
  2. Determine whether public sewer is feasible; where it is not, submit the septic application, fees, and site and soils materials for county review and a pre-permit inspection5846.
  3. Obtain a state well permit if the home needs a new or replacement well59.
  4. Submit the project information and declarations required for the building permit60.
  5. If you plan to occupy an RV while building on Agricultural-zoned land, obtain a ZPMH before moving in61.
  6. After the permit is issued and work begins, you or your contractor must request inspections at the required stages, and the work needs approval before it is concealed6263.
  7. Get the rough inspections and every other scheduled inspection approved and complete all conditions on the permit; final approval and the certificate of occupancy require both6465.

What to check before you buy land in Weld County

Weld County is flat, dry and largely open: 98.7% of its land has a slope of 15% or less, 1.3% is wooded, and annual precipitation averages 14.4 inches666768. Severe drought occurs in about 14.9% of years, so investigate the parcel's water source before relying on a well or dryland pasture69. New and replacement wells require the appropriate Colorado Division of Water Resources application and fee, with basin-specific rules potentially applying59. Check public-water availability, sewer feasibility and septic records before closing; subdivision generally requires public water rather than well water5870. In floodplain areas, development and new construction need a Flood Hazard Development Permit71. Confirm driveway requirements with Planning and Development Services because a general access-permit trigger could not be confirmed.

Watch-outs

  • An RV cannot serve as the principal dwelling on land governed by Weld County zoning; the construction exception is temporary, limited to Agricultural-zoned property and requires a ZPMH37.
  • An owner-builder may personally perform listed work only at a residence they occupy or will occupy; building permits, inspections and licensed-trade requirements still apply5.
  • Weld County requires public sewer where feasible; choosing an off-grid home does not remove county OWTS permit and inspection requirements5372.
  • A home on a septic system that was never permitted triggers an OWTS evaluation and inspection when a building permit is applied for, including a pumping receipt from the past 2 years48.
  • The Agricultural Exempt (COC) category is published, but its exact eligibility and scope could not be confirmed; ask the Building Division before treating a farm structure as permit-exempt24.
  • A Flood Hazard Development Permit is required for development and new construction in Weld County floodplain areas, so check floodplain mapping for the parcel before buying71.

Sources

  1. Building Permit Applications and Inspections, quoted and re-checked
  2. Weld County Commissioners approve updates to zoning code, quoted and re-checked
  3. Zoning Permit for Manufactured Home/Structures (ZPMH) Procedural Guide, quoted and re-checked
  4. Environmental Health Services, quoted and re-checked
  5. Homeowner Affidavit, quoted and re-checked
  6. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
  7. Current Planning – Weld County, quoted and re-checked
  8. Current Planning – Weld County, quoted and re-checked
  9. Water Administration (Colorado statewide rule), quoted and re-checked
  10. Building Permit Applications and Inspections, quoted and re-checked
  11. Building Codes, Design Criteria and Fees, quoted and re-checked
  12. Building Permit Applications and Inspections (2026 county census)
  13. Building Permit Applications and Inspections, quoted and re-checked
  14. Town of Frederick: Town of Frederick Building Codes (official town page) (Weld County), quoted and re-checked
  15. Town of Berthoud: Building Department | Berthoud, CO (Weld County), quoted and re-checked
  16. Town of Severance: Severance Municipal Code Sec. 18-2-30 Residential Code amendments (Weld County), quoted and re-checked
  17. Town of Milliken: Milliken Municipal Code Sec. 16-4-405 Manufactured Home Design Standards/Building Requirements (Weld County), quoted and re-checked
  18. Dacono: Dacono Code Sec. 18-40 Codes adopted; scope (Weld County), quoted and re-checked
  19. Weld County Planning and Development Services, Building Division (weld.gov)
  20. Building Permit Applications and Inspections, quoted and re-checked
  21. Current Planning – Weld County, quoted and re-checked
  22. WELD COUNTY BUILDING PERMIT & INSPECTION FEE SCHEDULE, quoted and re-checked
  23. 2024 Planning Fee Schedule, quoted and re-checked
  24. Building Permit Applications and Inspections, quoted and re-checked
  25. Current Planning – Weld County, quoted and re-checked
  26. Zoning Permit for Manufactured Home/Structures (ZPMH) Procedural Guide, quoted and re-checked
  27. Zoning Permit for Manufactured Home/Structures (ZPMH) Procedural Guide, quoted and re-checked
  28. Current Planning – Weld County, quoted and re-checked
  29. Current Planning – Weld County, quoted and re-checked
  30. Town of Erie: Erie Code 10-3-1 Table of permitted uses (Weld County), quoted and re-checked
  31. Evans: Evans Municipal Code 18.05.020 Lot creation (residential) (Weld County), quoted and re-checked
  32. Town of Johnstown: Article 4: Districts and Uses (Weld County), quoted and re-checked
  33. Town of Firestone: Firestone Municipal Code 16.2.1 General provisions (zoning districts) (Weld County), quoted and re-checked
  34. Town of Frederick: Town of Frederick Land Use Code (official town page) (Weld County), quoted and re-checked
  35. Town of Berthoud: Planning Department | Berthoud, CO (Weld County), quoted and re-checked
  36. Town of Severance: Severance Municipal Code Sec. 16.3.105 Lot and building standards (Rural Residential) (Weld County), quoted and re-checked
  37. Fort Lupton: Fort Lupton Municipal Code Sec. 16-11.02 Description of uses (Weld County), quoted and re-checked
  38. Town of Milliken: Milliken Municipal Code Sec. 16-2-100 Residential Estate (R-1E) (Weld County), quoted and re-checked
  39. Town of Lochbuie: Lochbuie Municipal Code Sec. 19-1-205, Compliance (Weld County), quoted and re-checked
  40. Dacono: Dacono Code Sec. 16-602 ADU standards and requirements (Weld County), quoted and re-checked
  41. Town of Lochbuie: Weld County New System, Repair, Vault, and Statement of Existing (Weld County), quoted and re-checked
  42. Town of Johnstown: official source (Weld County), quoted and re-checked
  43. Septic Systems (On-site Wastewater Treatment Systems) – Weld County, quoted and re-checked
  44. Septic Systems (On-site Wastewater Treatment Systems) – Weld County, quoted and re-checked
  45. Septic Systems (On-site Wastewater Treatment Systems) – Weld County, quoted and re-checked
  46. New System, Repair, Vault, and Statement of Existing, quoted and re-checked
  47. Zoning Permits and Bedroom Additions, quoted and re-checked
  48. Zoning Permits and Bedroom Additions – Weld County, quoted and re-checked
  49. New System, Repair, Vault, and Statement of Existing, quoted and re-checked
  50. Septic Systems (On-site Wastewater Treatment Systems), quoted and re-checked
  51. Septic Systems (On-site Wastewater Treatment Systems), quoted and re-checked
  52. Septic Systems (On-site Wastewater Treatment Systems) – Weld County, quoted and re-checked
  53. Septic Systems (On-site Wastewater Treatment Systems), quoted and re-checked
  54. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  55. Weld County Environmental Health Services (On-Site Wastewater Treatment Systems / Septic) (weld.gov)
  56. Current Planning – Weld County, quoted and re-checked
  57. Current Planning – Weld County, quoted and re-checked
  58. Septic Systems (On-site Wastewater Treatment Systems) – Weld County, quoted and re-checked
  59. Well Permitting | Division of Water Resources, quoted and re-checked
  60. Building Permit Applications and Inspections, quoted and re-checked
  61. Current Planning, quoted and re-checked
  62. Building Permit Applications and Inspections, quoted and re-checked
  63. Building Permit Applications and Inspections, quoted and re-checked
  64. Building Permit Applications and Inspections, quoted and re-checked
  65. Building Permit Applications and Inspections, quoted and re-checked
  66. Share of land at 15% slope or less: Bolthole Index county data
  67. Wooded share of land: Bolthole Index county data
  68. Annual precipitation: Bolthole Index county data
  69. Share of years in severe drought: Bolthole Index county data
  70. Current Planning – Weld County, quoted and re-checked
  71. Floodplain Management – Weld County, quoted and re-checked
  72. Septic Systems (On-site Wastewater Treatment Systems), quoted and re-checked

Written October 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Weld County requires a building permit for a home.

RuleWeld CountyBroomfield CountyMorgan CountyAdams CountyBoulder CountyLarimer CountyDenver County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Dept. of Public Health & Env.Broomfield Health Protection Div.NCHDCounty Health Dept.County Public HealthCounty Dept. of Health & Env.Denver Dept. of Public Health & Env.

County locator

Weld County in Colorado

44
County map
Weld County highlighted among the Colorado counties · colored by Index score

How Weld County scores

Seclusion60100% ev.
Self-Sufficiency1692% ev.
Admin Boringness4190% ev.
Durability63100% ev.
Property Autonomy75100% ev.
Carry Cost76100% ev.

Evidence strength: 97%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$498kTypical home
0.5%Property tax
$3,798Land / acre
14.4"Annual rain
14.9% of yrsSevere drought
10.6 / yr (+9.6)Mid-century 100°F days
25.1 daysMid-century dry spell
1.01" (+5.7%)Mid-century 1-day rain
1.31×Wildfire change factor
100%Forward climate coverage
$2,627Home insurance / yr
5.7% / yrInsurance growth
1.22%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
810,667People within 2 hr
8,931Radius comparison (15 mi)
90.2People / sq mi
8.4%Federal land
98.7%Land at 15% slope or less
62.6%Soils rated "not limited" for septic (strict USDA rating)
1,427,938 acWorkable land screen
1.3%Wooded land
49.2°FAvg temp

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Cities and towns in Weld County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Town of Ault · Town of Grover · Town of La Salle · Town of Raymer (New Raymer) · Town of Windsor

Answers from the rulebook for Weld County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Weld County rules

  • Building permitRequired

    Buildings and structures regulated by the Weld County Building Code.

    • A separate permit is required before erection, construction, enlargement, alteration, repair, movement, improvement, removal, conversion, or demolition.
    • The page references a county list of structures that do not require a building permit.
    • A permit application must be submitted for all projects.
    “No building or structure, regulated by this Building Code shall be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished unless a separate building permit for each building or structure has been first obtained from the Building Inspection Division.”
    One more reviewed finding on this topic
    • Required — Structures regulated by the Weld County Building Code in unincorporated Weld County.
      “No building or structure, regulated by this Building Code shall be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished unless a separate building permit for each building or structure has been first obtained from the Building Inspection Division.”
  • Owner-builder exemptionAvailable (with conditions)

    Residential construction performed by the property owner personally at the owner's residence in unincorporated Weld County, subject to the county permit and inspection process.

    • The owner must personally reside or will personally reside at the residential property.
    • The owner may perform listed work including electrical, framing, foundation, plumbing, and mechanical work.
    • A building permit is still required for regulated construction; the owner-builder option does not eliminate the permit requirement.
    • For plumbing or electrical services for which the owner pays a fixed fee, trade-in-kind, or other compensation, the owner must employ electricians or plumbers licensed by the State of Colorado.
    • Required rough, shear-nailing, weather-resistant-barrier, concrete, and underground utility inspections must be completed before the specified work is concealed or covered.
    • The property address must be clearly posted and the building permit must be onsite and accessible for inspections.
    • Failure to comply with the affidavit may result in penalties, including withholding of building permits or certificates of occupancy.
    “In Weld County, Colorado, do hereby attest the I(we) will/do personally reside at this property and that I(we) will be performing the following: (Check all applicable) Electrical ______ Framing ______ Foundation Work Plumbing ______ Mechanical”
  • Building code adoptedAdopted (with conditions)

    Buildings and structures regulated by the Weld County Building Code.

    • The page identifies the Weld County Code, Chapter 29, as imposing permit-application information and declaration requirements.
    • The page also links a county list of structures that do not require a building permit.
    “Failure to comply with inspection requirements and adopted codes can result in a building code violation and costly delays.”
    One more reviewed finding on this topic
    • Adopted — Building-code enforcement in all areas of unincorporated Weld County.
      “Effective June 15, 2026, Weld County Building Code adopted and enforces the following International Codes in all areas of Unincorporated Weld County:”
  • InspectionsRequired

    Construction performed under a Weld County building permit.

    • Inspections are requested after the permit is issued and work has begun.
    • Required inspections are marked on the permit forms.
    • Rough inspections require prior approval of setbacks, footing or caissons, foundation, concrete encased electrode, perimeter drains, and damp proofing if required or applicable.
    • Work must be inspected and approved before concealment.
    “After the permit has been issued and you have begun work, you or your contractor must request inspections at certain times.”
    One more reviewed finding on this topic
    • Required — Construction subject to a Weld County building permit.
      “After the permit has been issued and you have begun work, you or your contractor must request inspections at certain times.”
  • Certificate of occupancyRequired

    Final approval and certificate of occupancy for permitted construction.

    • Rough inspections and all other required scheduled inspections must be approved.
    • All conditions of approval on the permit must be completed.
    “Final Approval and Certificate of Occupancy require all conditions of approval on the permit to be completed as well.”
    One more reviewed finding on this topic
    • Required — Projects requiring final approval under the Weld County building-permit process.
      “Final Approval and Certificate of Occupancy require all conditions of approval on the permit to be completed as well.”
  • County-wide zoningPresent (with conditions)

    Zoning regulation administered by Weld County in unincorporated Weld County.

    • The cited ordinances apply to unincorporated Weld County.
    • Ordinances 2025-11 and 2025-15 took effect on November 26, 2025.
    • The cited source describes Chapter 23 zoning and does not establish county zoning authority inside incorporated municipalities.
    “The Weld County Board of Commissioners approved two ordinances updating Chapter 23 (Zoning) of the Weld County Code. Ordinance 2025-11 updates zoning standards to improve clarity and consistency, and Ordinance 2025-15 strengthens building setback requirements around oil and gas facilities. Both ordinances apply to unincorporated Weld County and take effect Nov. 26, 2025.”
    One more reviewed finding on this topic
    • Present (with conditions) — County zoning regulations and zoning districts in unincorporated Weld County.
      “The current planning process is designed to provide a consistent review of individual land-use matters through standards adopted by the County. Zoning regulations are rules that define how a property can be used.”
  • Zoning districtsPublished (with conditions)

    Zoning districts and zoning-map information for unincorporated Weld County.

    • The County identifies Agricultural, Residential, Commercial, Industrial, Estate, and Planned Unit Development zoning categories.
    • The County provides a zoning map for property-specific verification.
    • Actual regulations are in the Weld County Code.
    “Weld County has different uses for each property’s zoning. These are outlined in the Weld County Code. A (Agricultural) Zone District – Section 23-3-10 Residential Zone Districts – Section 23-3-100 Commercial Zone Districts – Section 23-3-200 Industrial Zone Districts – Section 23-3-300 E (Estate) Zone District – Section 23-3-400 PUD (Planned Unit Development) - Chapter 27.”
    One more reviewed finding on this topic
  • Minimum lot sizeSpecified

    Unplatted land in the A Agricultural Zone District in unincorporated Weld County.

    • The cited 35-acre minimum applies to unplatted land in the A Agricultural Zone District.
    • Subdivision also requires public water, and many other criteria apply.
    • The source is not a countywide minimum for every zoning district.

    minimum lot size: >= 35 acres (Unplatted land in the A Agricultural Zone District.)

    “The minimum lot size of unplatted land in the A (Agricultural) Zone District in unincorporated Weld County is 35 acres. In order to subdivide land, public water is required (this does not include well water).”
  • SetbacksSpecified

    Setbacks and offsets in unincorporated Weld County zoning districts.

    • Requirements depend on the property's zoning district.
    • A-zone offsets are 3 feet or 1 foot for every 3 feet of building height, whichever is greater.
    • Residential-zone offsets are 5 feet or 1 foot for every 3 feet of building height, whichever is greater.
    • Commercial and industrial districts have additional stated requirements.

    A-zone setback: 20 feet · Residential-zone setback: 20 feet · Commercial-zone setback: 25 feet · Industrial-zone setback: 25 feet

    “The setbacks (distance from edge of right of way) and offsets (distance from other property lines) of your property depend on the zoning of your property.”
  • Living in an RVTemporary only (with conditions)

    Living in a recreational vehicle while building a home on property zoned A (Agricultural) in unincorporated Weld County.

    • The property must be zoned A (Agricultural).
    • The use is temporary.
    • A Zoning Permit for a Manufactured Home (ZPMH) is required.
    • Applicants should contact Weld County at (970) 400-6100 or apply online through the County E-Permit Center.
    “Can I live in a Recreational Vehicle (RV) while building my home? If your property is zoned A (Agricultural), this is a temporary use permittable through a Zoning Permit for a Manufactured Home (ZPMH). Please contact us at (970) 400-6100 for further information or apply online through our E-Permit Center.”
    3 more reviewed findings on this topic
    • Prohibited — Use of a recreational vehicle as a principal dwelling unit on property governed by Weld County zoning in unincorporated Weld County.
      “A Recreational Vehicle shall not be used [...] as a Principal Dwelling Unit.”
    • Temporary only (with conditions) — Living in an RV while building a home on property zoned Agricultural.
      “Temporary use of a manufactured home or RV during construction of a permanent residence”
    • Limited — Living in an RV while building a home on property zoned A (Agricultural) in unincorporated Weld County.
      “If your property is zoned A (Agricultural), this is a temporary use permittable through a Zoning Permit for a Manufactured Home (ZPMH).”
  • Manufactured homesLimited

    Manufactured-home occupancy in the Agricultural, Commercial, and Industrial zone districts under the ZPMH process.

    • Agricultural temporary construction use, annual accessory farmworker use, and caretaker/security use in Commercial or Industrial zones have separate conditions.
    • A building permit is required in addition to the zoning permit.
    • Adequate water and sewage disposal facilities are required.
    “One manufactured home may be permitted for the following use in the C (Commercial) or I (Industrial) zone districts with issuance of a ZPMH:”
  • Accessory dwellingsLimited

    Accessory dwelling units in unincorporated Weld County.

    • Most unincorporated properties may have an ADU with a building permit.
    • Agricultural-zone properties generally require at least 1 acre with public water and septic, or 2.5 acres with well and septic.
    • R-1, R-2, and R-5 ADUs require public water and public sewer; a septic exception requires at least 1 acre with public water and the nearest sewer line at least 400 feet away.
    • No more than one ADU, for two dwelling units total, is allowed per lot.
    • An ADU must share the driveway with the existing house; no new driveway is allowed.
    • The ADU must meet the same building-code requirements as other homes, and septic or water-provider requirements may apply.

    maximum ADUs per lot: 1 ADU (Two dwelling units total per lot.) · minimum agricultural lot size with well and septic: >= 2.5 acres · minimum agricultural lot size with public water and septic: >= 1 acre · nearest sewer-line distance for specified septic exception: >= 400 feet (For lots of at least 1 acre with public water in R-1, R-2, and R-5.)

    “Most properties in unincorporated Weld County can now have an Accessory Dwelling Unit with just a building permit (ADU permit). In the Agricultural zone, including in Ag-zoned subdivisions like Aristocrat Ranchettes, Arrowhead, and Indianhead, a minimum of 1 acre is required if the property has public water and is on septic. A minimum of 2.5 acres is required for lots on well and septic.”
  • Who permits septicCounty (with conditions)

    OWTS with flows less than 2,000 gallons per day in Weld County.

    • The Environmental Health Services Division administers the permitting process and performs site evaluations, design reviews, and inspections.
    • The county page identifies local ordinances and state statutes as part of the broader environmental-health compliance framework.

    OWTS flow threshold: < 2000 gallons per day

    “The Environmental Health Services Division oversees the permitting process of onsite wastewater treatment systems (OWTS), with flows less than 2,000 gallons per day, including site evaluations, design reviews, and inspections.”
    2 more reviewed findings on this topic
  • Septic permitRequired

    Residential OWTS evaluation and inspection when a building permit increases bedrooms, involves specified land-use cases requiring verification of an unpermitted system, or concerns a home served by an OWTS that has never been permitted.

    • For increased bedrooms, the home must be served by an OWTS; medical-hardship applications are included.
    • Certain land-use cases include Subdivision Exemptions and Use by Special Review.
    • For an unpermitted system, the county requires checking whether a permit is on file, completing the Statement of Existing form and map, completing the OWTS Evaluation Form, providing a pumping receipt from within the prior two years, and paying the appropriate fee and scheduling an inspection.
    • Commercial facilities have separate triggers, including increased hydraulic flows, changes in usage from land-use planning, or similar circumstances; a registered professional engineer must perform the evaluation and inspection.

    pumping receipt lookback: 2 years (Receipt must show gallons pumped from the septic tank and the tank must be pumped by a Health Department-licensed septic tank cleaner.)

    “An On-site Wastewater Treatment System (OWTS) evaluation and inspection is required for the following scenarios: If a building permit has been applied for with an increase in the number of bedrooms in the home and the home is served by an OWTS. This also includes application for medical hardship cases.”
    3 more reviewed findings on this topic
    • Required — New, repaired, upgraded, reconnected, or vault OWTS systems.
      “A permit will not be issued until these items are submitted, and you must come to the Weld County Department of Public Health and Environment with all forms and fees to have your request processed.”
    • Required — Installing a new OWTS, repairing or upgrading an existing OWTS, reconnecting to an approved existing system, or installing a vault in Weld County.
      “If you wish to install a new system, repair or upgrade an existing system, reconnect to an approved existing system, or install a vault, you will need an application form. A vault is allowed only in specific circumstances. Please contact the Environmental Health Services Division at (970) 400-6415 to determine if your situation qualifies.”
    • Required — New, repaired, upgraded, reconnected, or vault OWTS systems in Weld County.
      “If you wish to install a new system, repair or upgrade an existing system, reconnect to an approved existing system, or install a vault, you will need an application form.”
  • Septic inspectionLimited

    OWTS associated with bedroom additions, certain land-use cases, unpermitted systems, and specified commercial changes.

    • Residential evaluation and inspection is required for increased bedrooms, medical hardship applications, certain subdivision exemptions or use-by-special-review cases, and any building permit application where the OWTS has never been permitted.
    • Commercial evaluation and inspection is required when a building permit increases hydraulic flows, changes usage through land-use planning, or similar circumstances.
    • A registered professional engineer must perform commercial evaluations and inspections.
    “An On-site Wastewater Treatment System (OWTS) evaluation and inspection is required for the following scenarios:”
    One more reviewed finding on this topic
  • Off-grid sanitationLimited

    OWTS as an off-grid domestic sewage-disposal option in Weld County.

    • Public sewer use is required where and whenever feasible.
    • OWTS installation is limited to areas not feasible for public sewers.
    • OWTS permitting and inspection requirements still apply.
    “It is the policy of the Weld County Board of Public Health and the Board of Weld County Commissioners to require the use of public sewer systems where and whenever feasible and to limit the installation of on-site wastewater treatment systems (OWTS) to areas that are not feasible for public sewers.”
    2 more reviewed findings on this topic
    • Limited — Private OWTS as an alternative to public sewer service.
      “It is the policy of the Weld County Board of Public Health and the Board of Weld County Commissioners to require the use of public sewer systems where and whenever feasible and to limit the installation of on-site wastewater treatment systems (OWTS) to areas that are not feasible for public sewers.”
    • Limited — OWTS-based, non-public-sewer domestic sewage disposal in Weld County.
      “It is the policy of the Weld County Board of Public Health and the Board of Weld County Commissioners to require the use of public sewer systems where and whenever feasible and to limit the installation of on-site wastewater treatment systems (OWTS) to areas that are not feasible for public sewers.”
  • Mandatory utility hookupConditional

    Domestic sewage disposal and utility availability for Weld County development.

    • Public sewer is required where and whenever feasible.
    • In unincorporated agricultural zoning, subdivision generally requires public water and well water does not qualify under the cited County FAQ.
    • Property-specific water-provider and septic requirements may apply.
    “In order to subdivide land, public water is required (this does not include well water).”
    2 more reviewed findings on this topic
    • Conditional — Domestic sewage disposal for properties subject to Weld County OWTS rules.
      “It is the policy of the Weld County Board of Public Health and the Board of Weld County Commissioners to require the use of public sewer systems where and whenever feasible and to limit the installation of on-site wastewater treatment systems (OWTS) to areas that are not feasible for public sewers.”
    • Sewer (with conditions) — Domestic sewage disposal and OWTS installation in Weld County.
      “It is the policy of the Weld County Board of Public Health and the Board of Weld County Commissioners to require the use of public sewer systems where and whenever feasible and to limit the installation of on-site wastewater treatment systems (OWTS) to areas that are not feasible for public sewers.”
  • Agricultural exemptionConditional

    Projects submitted under the county's Agricultural Exempt (COC) category.

    • The official building page identifies Agricultural Exempt (COC) as a project-specific requirements category.
    • The opened page does not state the exact eligibility criteria or scope of the exemption.
    “Please visit the individual webpages for a list of the specific requirements for Residential, Commercial, Agricultural Exempt (COC), or Oil and Gas projects.”
  • Subdividing landRegulated (with conditions)

    Subdivision and land division in unincorporated Weld County.

    • The County states that public water is required for subdivision and that many other criteria apply.
    • Agricultural-zone land division depends on acreage, zoning, active farm or ranch status, subdivision status, adequate water, and other factors.

    minimum agricultural-zone unplatted lot size: >= 35 acres (As stated for unplatted land in the A Agricultural Zone District.)

    “In order to subdivide land, public water is required (this does not include well water). If you have public water you may be able to subdivide your land depending on the acreage and location. Many other criteria apply.”
  • Building in a floodplainRequired

    Development, new construction, pipelines, expansion of buildings, and internal building work in Weld County floodplain areas.

    • A Flood Hazard Development Permit is required for all development, new construction, pipelines, or expansion of buildings in floodplain areas.
    • A Floodplain Permit is required if the work is internal to a building.
    • Floodplain mapping and property-specific flood hazards must be checked.
    “A Floodplain Permit (FP) is required if the work is internal to a building.”
  • Permit feesPublished (with conditions)

    Published Weld County planning and land-use permit fees.

    • The source is a 2024 planning fee schedule; current fees may differ.
    • Fees vary by permit type, project size, access type, and other listed conditions.
    • Examples include a $180 Flood Hazard Development Permit fee, $150 residential access permit fee, and $300 commercial or industrial access permit fee.

    Flood Hazard Development Permit fee: 180 USD (2024 schedule) · Residential Access fee: 150 USD (2024 schedule) · Commercial or Industrial Access fee: 300 USD (2024 schedule)

    “Flood Hazard Development Permit (FHDP) $180.00”
    One more reviewed finding on this topic
    • Published (with conditions) — Weld County building, inspection, impact, electrical, and related permit fees.
      “WELD COUNTY BUILDING PERMIT & INSPECTION FEE SCHEDULE JANUARY 2025 Building Permit Fees: Total Valuation Fee (calculated according to building valuation per sq. ft.)”
  • Permit processPublished (with conditions)

    County building-permit application process.

    • A permit application must be submitted for all projects.
    • Chapter 29 requires specific information and declarations.
    • The county page links project-specific residential, commercial, agricultural-exempt, and oil-and-gas requirements.
    • Some structures are identified by the county as not requiring a building permit.
    “A permit application must be submitted for all projects. The Weld County Code, Chapter 29, requires that every permit applicant supply specific information and certain declarations regarding the proposed work.”
    2 more reviewed findings on this topic
    • Published — Weld County building, inspection, septic, zoning, and land-use permitting processes.
      “A permit application must be submitted for all projects. The Weld County Code, Chapter 29, requires that every permit applicant supply specific information and certain declarations regarding the proposed work.”
    • Published (with conditions) — Weld County land-use permit process and planning applications.
      “To learn about land use cases, please visit the E-Permit Center, select the "Planning" tab at the top of the page. You can search by either the Record Number (case number), street address or parcel number, then click the "Search" button.”

Colorado rules that apply here

  • Building heightDistrict specific (with conditions)

    Municipal zoning districts in Colorado where the municipality adopts building-height or story regulations.

    • The applicable height or story limit is determined by the municipality's zoning regulations and district classification.
    • The statute provides authority but no statewide numeric height limit.
    • Height restrictions do not apply to existing buildings under the cited municipal zoning authority, except as stated for new growth of vegetation.

    building height or number of stories: local regulation (No statewide numeric limit specified)

    “the governing body of each municipality is empowered to regulate and restrict the height, number of stories, and size of buildings and other structures”
  • Tiny homesAllowed (with conditions)

    Colorado Division of Housing-regulated tiny homes intended for residential occupancy and long-term living.

    • Plans must be submitted to the Colorado Division of Housing for approval before construction of the units.
    • The unit must satisfy applicable Colorado-adopted codes and standards and local zoning requirements.
    • Tiny home units are certified for the specific site where installed; relocation to another Colorado site requires the applicable design criteria, and design differences require revisions.

    foundation types: permanent or temporary

    “Tiny homes are approved for long term living”
  • Well permitRequired

    Every new groundwater-diverting well in Colorado, including residential wells, subject to statutory exemptions and basin-specific rules.

    • The Division of Water Resources administers groundwater permitting and issues permits.
    • Applicants must complete the appropriate application and pay the associated fee.
    • Statutory exemptions and additional Denver Basin or Designated Basin rules may affect the requirement or permit conditions.
    • In many areas, a well may also require an augmentation plan if its priority is not sufficient to divert in priority.

    complete-application review time: <= 49 days (DWR states review of complete new and replacement applications may take up to 49 days)

    “Every new well in the state that diverts groundwater must have a well permit.”
    One more reviewed finding on this topic
    • Required — New, replacement, or existing wells on Weld County parcels under Colorado DWR jurisdiction.
      “The first step is to complete the appropriate application and pay the associated fee.”
  • Driveway accessRequired

    Direct residential access from a property to a Colorado state highway, and construction, relocation, closure, modification, or change in use of access points to state highways.

    • Direct access from a house to a state highway requires an access permit.
    • Some state-highway access categories require access from a lesser street or by easement from a parent parcel whenever possible.
    • Level 1 permits cover single-family residential/agricultural permits; Level 2 covers commercial property and developments exceeding 20 vehicular trips per day without roadway improvements; Level 3 covers commercial property requiring roadway improvements.
    • Level 1 fees are $50, Level 2 fees are $100, and Level 3 fees are $300.
    • No fees are charged to local government applications or political subdivisions.
    • There is no upfront charge to review an Access Permit Application.
    • The permittee is responsible for roadway-improvement costs required with issuance of an access permit.
    • Performance-bond requirements apply only to private projects; local agencies are not required to comply, although CDOT regions may require a bond at their discretion.

    Level 1 access permit fee: 50 USD (Single-family residential/agricultural permits) · Level 2 access permit fee: 100 USD (Commercial property permits and developments exceeding 20 vehicular trips per day without roadway improvements) · Level 3 access permit fee: 300 USD (Commercial property permits requiring roadway improvements)

    “If you want the house to have direct access off of the state highway, then you will need an access permit.”
  • Short-term rentalsLimited

    Short-term rentals statewide, defined in the cited official source as lodging-unit rentals for fewer than 30 days.

    • There is no statewide STR regulatory scheme.
    • Boards of county commissioners may license and regulate STR owners or agencies and set license fees, terms, issuance, and revocation procedures.
    • Home-rule municipalities and private contracts or homeowners' association covenants may impose additional restrictions.

    maximum rental duration for STR definition: < 30 days

    “There are no statewide regulations regarding STRs. As established through House Bill 20-1093, state law allows for boards of county commissioners (BOCCs) to license and regulate an owner or owner’s agency and to fix the fees, terms, and manner for issuing and revoking licenses.”
  • Campground & park staysAllowed (with conditions)

    Temporary overnight camping, including parking a motor home or traveler, on land and water under the control of Colorado Parks and Wildlife, including state parks and state recreation areas.

    • The source addresses lands and waters under the control of the Division of Parks and Wildlife, not all public or private land statewide.
    • Camping includes parking a motor vehicle, motor home, or traveler for the apparent purpose of overnight occupancy.
    • A commission-issued permit may be required; the statute defines permits to include campground permits and electrical hookup permits.
    • The state may charge fees for required passes or permits for use of any state park or state recreation area where supervision, maintenance, or specified facilities warrant a fee.

    overnight occupancy: true (Camping definition includes the parking of a motor vehicle, motor home, or traveler for the apparent purpose of overnight occupancy.) · permit types: campground permits; electrical hookup permits

    “Develop state parks and state recreation areas suitable for such recreational activities as camping, [...] "Camping" means [...] the parking of a motor vehicle, motor home, or traveler”
  • county zoning authorityGeneral

    Colorado counties adopting zoning plans for all or any part of unincorporated territory.

    • The county planning commission may make the zoning plan; in a county having a county planning commission, it must do so upon order by the board of county commissioners.
    • The zoning plan may regulate districts or zones, including building location, height, bulk, size, lot coverage, lot size, open spaces, population density, building and land uses, and access to sunlight for solar energy devices.
    • The plan may include regulations for uses on or along storm or floodwater runoff channels or basins only when the channel or basin has been designated and approved by the Colorado water conservation board, to lessen or avoid hazards from storm or floodwaters.
    • The statute applies to unincorporated territory and does not describe incorporated cities or towns as within this county zoning grant.
    “zoning all or any part of the unincorporated territory within such county”
  • county building authorityGeneral

    Colorado counties adopting and enforcing building codes and requiring building permits in designated unincorporated areas.

    • A board of county commissioners may adopt a building code in all or part of the county, but the area must not be within the limits of an incorporated city or town.
    • Buildings or structures used solely to shelter agricultural implements, farm products, livestock, or poultry may be excepted from the building code and permit requirement.
    • Before adoption, the county planning commission may designate part or all of the county for the building code upon request from the board of county commissioners; the board must hold a public hearing and publish notice once weekly for four consecutive weeks.
    • After adoption of the building code, construction, reconstruction, alteration, or remodeling in the designated area requires a building permit, except for the agricultural-shelter exception.
    • The board must fix a reasonable schedule of building-permit fees; no permit fee may be charged unless a qualified inspector actually performs an inspection.
    • Plans must conform to the building code, and plans and specifications generally must bear the seal of a Colorado-licensed architect or engineer unless exempted by section 12-120-403.
    • Every county adopting or updating a building code must adopt and enforce an energy code meeting or exceeding one of the three most recent International Energy Conservation Code versions under section 30-28-211.
    • The 2025 amendment to section 30-28-204 is effective January 1, 2026 and adds accessibility requirements for substantially amended or updated county building codes, with an exception for compliant one- and two-family dwellings and townhomes.
    “A board of county commissioners is authorized to adopt ordinances and a building code”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Local zoning — Aggregate local zoning across Weld County municipalities, towns, townships, and unincorporated areas.
  • Minimum dwelling size — Minimum dwelling size requirements in unincorporated Weld County.
  • Lot coverage — Lot-coverage requirements in unincorporated Weld County.
  • Camping on your land — Temporary camping on private property in Weld County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Weld County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Colorado’s water agency.

Over-appropriated / declining

The aquifer here is over-appropriated and declining. A domestic well is usually still permit-exempt, but long-term supply is a genuine risk.

Household wellExempt up to a limit

A household obtains water via a permit-exempt small-capacity well (15 gpm) under CRS 37-92-602 outside designated basins or CRS 37-90-105 inside them; on a 35-acre-plus lot limited outside/stock/1-acre irrigation is allowed.

Limit: Household-use-only well: 15 gpm, ≤0.33 acre-ft/yr, indoor only. Domestic well on a 35+ acre tract: 15 gpm, ≤1 acre-ft/yr.

Colorado DWR — Guideline 2023-1, Exempt & Small-Capacity Wells ↗
  • Lost Creek Designated Ground Water Basinpartial of county

    Lost Creek designated basin NE of Denver; over-appropriated alluvial aquifer, new large-capacity appropriations limited. Small-capacity/domestic wells still permitted.

    Colorado DWR — Designated Basins / Division 3 ↗
  • Upper Crow Creek Designated Ground Water Basinlocalized of county

    Upper Crow Creek designated basin in northern Weld County; over-appropriated, new large-capacity appropriations limited. Small-capacity/domestic wells still permitted.

    Colorado DWR — Designated Basins / Division 3 ↗
  • Denver Basin nontributary bedrock aquifers (Dawson, Denver, Arapahoe, Laramie-Fox Hills)partial of county

    Nontributary bedrock groundwater is allocated to the overlying landowner on an assumed 100-year aquifer life and needs a well permit; finite and steadily declining.

    Colorado Water Knowledge (CSU) — Groundwater Rights ↗

Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Colorado state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Weld County, Colorado

Is Weld County a good place to live off-grid or homestead?

Weld County scores 44/100 on the Bolthole Index, a marginal county profile. Its strengths: manageable long-term carry cost and a stronger property-autonomy legal backdrop. Watch-outs: weak self-sufficiency basics: only 14.4″ of rain a year and more administrative friction around building and land use.

Do you need a building permit in Weld County, Colorado?

Weld County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Weld County Department of Public Health and Environment - Environmental Health Services. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Weld County?

Living in an RV on your own land in Weld County is allowed on a temporary basis only: Living in a recreational vehicle while building a home on property zoned A (Agricultural) in unincorporated Weld County. The property must be zoned A (Agricultural). The use is temporary. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Weld County, Colorado?

Land in Weld County runs about $3,798 per acre, based on the latest county data.

What is the water situation in Weld County?

Weld County gets about 14.4" of rain a year, with severe drought in roughly 14.9% of years. On water rights, Weld County lies in the Lost Creek Designated Ground Water Basin — Lost Creek designated basin NE of Denver; over-appropriated alluvial aquifer, new large-capacity appropriations limited. Small-capacity/domestic wells still permitted..

How remote is Weld County?

A typical private-land location has about 8,931 people within 15 miles and 3,739,580 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Weld compares in Colorado

Compare side-by-side →See all 64 Colorado counties ranked →